Rutile-type titanium dioxide and cosmetics using the same

ABSTRACT

A Rutile-type titanium dioxide having a rectangular particulate form configured such that major axial planes of rod-shaped particles having a minor axis diameter of 3 to 10 nm are oriented and aggregated in the minor axial direction, and a rod-shaped rutile-type titanium dioxide obtained by treating the rectangular rutile-type titanium dioxide with heat, wherein an apparent average major axial length of the oriented and aggregated particles is 100 to 400 nm, an apparent average minor axial length thereof is 30 to 150 nm, an apparent average axial ratio represented by apparent average major axial length/apparent average minor axial length is 2 to 5 and a specific surface area thereof is 10 to 100 m 2 /g.

TECHNICAL FIELD

The present invention relates to rutile-type titanium dioxide configuredsuch that rod-shaped fine particles are oriented and aggregated intorectangular forms, and rod-shaped rutile-type titanium dioxide obtainedby treating the rectangular rutile-type titanium dioxide with heat.

Furthermore, the present invention relates to cosmetics containing therutile-type titanium dioxide and having a UV-shielding function in awide range from UVB to UVA.

BACKGROUND ART

Recently, UV-rays have been recognized to give harmful influences on theskin and sunscreen cosmetics for preventing UV-rays have beenincreasingly demanded. In addition, also in makeup cosmetics for helpingthe skin appear uniform and beautiful, enhancing the UV-shielding effecthas been demanded. To satisfy such demands, cosmetics containing aUV-scattering agent such as fine particulate titanium dioxide and fineparticulate zinc oxide and an organic UV absorber have been developed;however, these cosmetics are required to be further enhanced in aUV-shielding effect. To enhance a UV-shielding effect, generally, aUV-scattering agent or a UV absorber is added in a large amount.However, if a UV-scattering agent such as fine particulate titaniumdioxide is blended in a large amount in a cosmetic, it results in grainyon the skin and a cosmetic forms a thick film to decrease transparency.In addition, a large content of UV absorber has a safety problem. If aperson of a sensitive skin uses such a cosmetic, the person may developa skin trouble such as rash. Actually, the content is limited byregulations, and thus, a large amount of argent cannot be blended. Forthese reasons, development of a UV-scattering agent, more specifically,titanium dioxide having high UV-shielding performance, in other words,titanium dioxide shielding UV rays in a small content, has been stronglydesired.

On the other hand, fine particulate titanium dioxide has a satisfactoryshielding effect against the UVB region (280 to 320 nm) and is blendedin order to improve SPF (Sun Protection Factor) serving as an index forUVB shielding property; however its effect of shielding UV rays in theUVA region (320 to 400 nm) is insufficient. Therefore, in the country,fine particulate zinc oxide is generally used as a UVA shielding agent.However, in Europe, zinc oxide is not approved as a UV-shielding agentfor cosmetics. In addition, if zinc oxide is blended in a largeconcentration, ions elute and irritate skin. This is a matter ofconcern. For these reasons, development of titanium dioxide having highUVA shielding effect has been increasingly demanded.

Absorption or scatteration of light by titanium dioxide brings theUV-shielding performance of fine particulate titanium dioxide. Theshielding effect against the UVB region is due to absorption of light bya band gap; however, the shielding effect against the UVA region is dueto scattering and there is a particle diameter at which maximumshielding performance can be obtained. With respect to the lightscattering of titanium dioxide and particle-diameter dependency of UVprotection effect, a computational approach based on the Mie theory (P.Stamatakis et al., J. Coatings Tech, 62 (10), 95 (1990)) is made inJapanese Patent Laid-Open No. 9-202722 (Patent Literature 1). Accordingto the results, in the case of light of 300 nm in wavelength, a maximumshield effect is obtained at a particle diameter of 30 to 60 nm;whereas, in the case of light of 350 nm in wavelength, the most suitableeffect is obtained at a particle diameter of 80 nm and in the case oflight of 400 nm in wavelength, the most suitable effect is obtained at aparticles diameter of 120 nm.

In view of this, the present inventors proposed, in Japanese PatentLaid-Open No. 11-322337 (Patent Literature 2), butterfly-shapedrutile-type titanium dioxide formed of aggregated and/or bound needleshaped fine particles, which have an apparent average major axial length(herein, the term “apparent” is used in order to show that the length isa measured value of the aggregated particles; the same shall applyhereinafter) of 0.1 μm (100 nm) or more. The butterfly-shaped titaniumdioxide has more excellent UV-shielding performance in the UVA regionthan a conventional UV-shielding titanium dioxide; however, theperformance is not satisfactory. The present inventors further proposed,in Japanese Patent Laid-Open No. 2010-173863 (Patent Literature 3),titanium dioxide having a particulate form configured such that themajor axial planes of individual rod-shaped particles (each having aminor axis diameter of 3 to 10 nm) are oriented and aggregated in theminor axial direction. The titanium dioxide is cocoon-shaped rutile-typetitanium dioxide, in which an apparent average major axial length ofparticles oriented and aggregated is 80 to 300 nm; an apparent averageminor axial length of particles oriented and aggregated is 30 to 150 nm;an apparent average axial ratio (represented by a value of apparentaverage major axial length/apparent average minor axial length) is 1.1to 4; both ends of the major axis of oriented and aggregated particleshave a spherical shape or elliptical shape; and a specific surface areais 120-180 m²/g. The cocoon-shaped rutile-type titanium dioxide has moreexcellent UV-shielding performance in the UVB region than conventionalUV-shielding titanium dioxide; however UV-shielding performance in theUVA region was not satisfactory.

CITATION LIST Patent Literature

-   [Patent Literature 1] Japanese Patent Laid-Open No. 9-202722-   [Patent Literature 2] Japanese Patent Laid-Open No. 11-322337-   [Patent Literature 3] Japanese Patent Laid-Open No. 2010-173863

SUMMARY OF INVENTION Technical Problem

The present invention was made in order to improve UV-shieldingperformance of a rutile-type titanium dioxide in the UVA region anddirected to providing rutile-type titanium dioxide having a UV-shieldingeffect in a wide range from UVB to UVA and providing cosmetics using therutile-type titanium dioxide.

Solution to Problem

The present inventors conducted intensive studies with a view toobtaining rutile-type titanium dioxide having shape-anisotropy andhaving a satisfactory UVA shielding property without deteriorating UVBshielding property. As a result, they found that rutile-type titaniumdioxide having a particulate form configured such that rod-shapedparticles are oriented and aggregated into rectangular forms, androd-shaped rutile-type titanium dioxide obtained by treating therectangular rutile-type titanium dioxide with heat, wherein, when a filmis formed from a paste prepared by dispersing such a rutile-typetitanium dioxide in dimethicone and its light transmissivity at awavelength of 550 nm, 360 nm and 280 nm are represented by T₅₅₃, T₃₆₀,and T₂₈₀, respectively, a value of (T₅₅₀×T₂₈₀/T₃₆₃) of 5.0 to 55.0 issatisfied, are excellent in UV-shielding performance, particularly inUVA shielding property. Based on the finding, the present invention wasaccomplished.

More specifically, the rutile-type titanium dioxide of the presentinvention refers to a rutile-type titanium dioxide having a rectangularparticulate form configured such that the major axial planes ofrod-shaped particles each having a major axis diameter of 30 to 200 nmand a minor axis diameter of 3 to 10 nm, are oriented and aggregated inthe minor axial direction, and refers to rod-shaped rutile-type titaniumdioxide which is obtained by treating the rectangular rutile-typetitanium dioxide with heat. The rutile-type titanium dioxide ischaracterized in that the oriented and aggregated particles have anapparent average major axial length of 100 to 400 nm, an apparentaverage minor axial length of 30 to 150 nm, an apparent average axialratio (represented by apparent average major axial length/apparentaverage minor axial length) of 2 to 5 and a specific surface area of 10to 100 m²/g.

The rectangular rutile-type titanium dioxide of the present inventionhas the same apparent average major axial length, apparent minor axiallength and average axial ratio as those of the cocoon-shaped rutile-typetitanium dioxide defined in Japanese Patent Laid-Open No. 2010-173863(Patent Literature 3). The cocoon-shaped rutile-type titanium dioxide ofPatent Literature 3 is aggregates of particles which are mutuallyconnected via van der Waals force. In order to form a cocoon shape, thecohesive force between rod-shaped particles is controlled to the extentthat projections and depressions are formed on the surface of theaggregates. Voids formed between particles at this time are used forimproving UVB shielding property. In contrast, the rectangularrutile-type titanium dioxide of the present invention is obtained bybinding particles via van der Waals force similarly to cocoon-shapedparticles; however, the cohesive force between mutual rod-shapedparticles is strong compared to cocoon-shaped particles, with the resultthat the surface of aggregated particles is compressed to form arectangular shape. Furthermore, since high aggregation force is applied,the number of voids within rectangular particles decreases, with theresult that aggregated particles behave as an aggregate like a singleparticle. Therefore, UVA shielding property improves. The cocoon-shapedrutile-type titanium dioxide of Patent Literature 3 is synthesized byadding an aliphatic hydroxy acid compound to an acid-soluble titaniumcompound under the acidic conditions of hydrochloric acid and performingthermal hydrolysis without performing a deflocculation treatment. Incontrast, in the present invention, the pH of an acid-soluble titaniumcompound is controlled with hydrochloric acid and a deflocculationtreatment is performed at a low temperature. Thereafter, hydrochloricacid is further added to the mixture and thermal hydrolysis isperformed. In the present invention, a rod-shaped particle serving as agrowth nucleus is generated at a low temperature and thereafter thermalhydrolysis is performed in a short time. In this manner, a strongaggregation state can be obtained. Owing to a difference in thesecohesive forces for forming particles, the specific surface area of thecocoon-shaped rutile-type titanium dioxide of Patent Literature 3 is 120to 180 m²/g; whereas, the specific surface area of the rutile-typetitanium dioxide of the present invention is as small as 10 to 100 m²/g.

The rectangular rutile-type titanium dioxide of the present invention isobtained by controlling the pH of a solution containing an acid-solubletitanium compound to 1 to 3 with hydrochloric acid, performing adeflocculation treatment at a temperature of 10 to 30° C., and furtheradding hydrochloric acid to perform hydrolysis at a temperature of 20 to80° C. Furthermore, the obtained rectangular rutile-type titaniumdioxide is treated with heat to obtain rod-shaped rutile-type titaniumdioxide.

Furthermore, the particle surface of the rutile-type titanium dioxidecan be coated with a layer of an inorganic substance and/or an organicsubstance. The inorganic substance is preferably a water-containingoxide or an oxide of one or more of compounds selected from aluminum,silicon, zinc, titanium, zirconium, iron, cerium and tin.

Furthermore, the organic substance is preferably one or more ofcompounds selected from a silicone compound, a coupling agent, afluorine compound and a fatty acid. Furthermore, cosmetics can beobtained using the rutile-type titanium dioxide.

Advantageous Effects of Invention

In the rutile-type titanium dioxide of the present invention having arectangular particulate form configured such that rod-shaped particlesare oriented and aggregated into rectangular forms and the rod-shapedrutile-type titanium dioxide prepared by treating the rectangularrutile-type titanium dioxide with heat into a rod-shape, an apparentmajor axial length of particles oriented and aggregated is 100 nm to 400nm, an apparent average minor axial length thereof is 30 to 150 nm andan apparent average axial ratio (represented by an apparent averagemajor axial length/apparent average minor axial length) is 2 to 5 and aspecific surface area is 10 to 100 m²/g. When the rutile-type titaniumdioxide of the present invention having such features is dispersed indimethicone to prepare paste and a coating film of the paste is formed,assuming that its light transmissivity at a wavelength 550 nm, 360 nmand 280 nm are represented by T₅₅₀, T₃₆₀, and T₂₈₀, respectively, avalue of (T₅₅₀×T₂₈₀/T₃₆₀) becomes 5.0 to 55.0. Thus, the rutile-typetitanium dioxide of the present invention has excellent UV-shieldingperformance compared to a conventional rutile-type titanium dioxide, inparticular, excellent UVA shielding property, and can provide cosmeticshaving more excellent UV-shielding performance than cosmetics usingconventional titanium dioxide. Herein, T₅₅₀ represents a transmissivityof visible light in the center wavelength range. If this value is large,transparency is high by itself. Furthermore, as already described, T₂₈₀represents a transmissivity in the UVB wavelength region; whereas T₃₆₀represents a transmissivity in the UVA wavelength region. Since a valueof (T₅₅₀×T₂₈₀/T₃₆₀) is represented by a product of T₅₅₀, the higher thevisible light transmissivity, the higher the value. Furthermore, thisvalue is in proportional to a reciprocal number of T₃₆₀. Therefore, themore excellent the shielding performance in the UVA region, the higherthe value. In contrast, if shielding performance in the UVB region ishigh, this value is low by itself. The value, if it is excessively low,means that transparency is low or the UV-shielding performance in theUVA region is low compared to UV-shielding performance in the UVBregion. Because of this, an excessive low value is not preferable.Conversely, an excessively high value suggests that the UV-shieldingperformance in the UVB region is low compared to UV-shieldingperformance in the UVA region.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows a micrograph of rectangular rutile-type titanium dioxideobtained in Example 1, observed under a transmission electronmicroscope.

FIG. 2 shows a micrograph of rectangular rutile-type titanium dioxideobtained in Example 2, observed under a transmission electronmicroscope.

FIG. 3 shows a micrograph of rod-shaped rutile-type titanium dioxideobtained in Example 3, observed under a transmission electronmicroscope.

FIG. 4 shows a micrograph of spindle-shaped rutile-type titanium dioxideobtained in Comparative Example 1, observed under a transmissionelectron microscope.

FIG. 5 shows a micrograph of cocoon-shaped rutile-type titanium dioxideobtained in Comparative Example 2, observed under a transmissionelectron microscope.

FIG. 6 is an absorbance curve of rutile-type titanium dioxides obtainedin Examples 1 to 3 and Comparative Examples 1 and 2.

DESCRIPTION OF EMBODIMENTS

Now, the rutile-type titanium dioxide of the present invention will bemore specifically described. The rutile-type titanium dioxide of thepresent invention refers to rectangular aggregated rutile-type titaniumdioxide particles constituted of particles oriented in the form of abundle or rod-shaped rutile-type titanium dioxide obtained by treatingthe rectangular rutile-type titanium dioxide with heat into a rod-shape.As already described, the rectangular or rod-shaped rutile-type titaniumdioxide is characterized in that the particles oriented and aggregatedhave an apparent average major axial length of 100 to 400 nm, anapparent average minor axial length of 30 to 150 nm, an apparent averageaxial ratio (represented by apparent average major axial length/apparentaverage minor axial length) of 2 to 5 and a specific surface area of 10to 100 m²/g. Individual particles constituting aggregated particles ofthe rectangular rutile-type titanium dioxide of the present inventionhave a rod-shape. Whereas the spindle-shaped particles known in the arthave a smooth surface, the rectangular particles, each are an aggregateobtained by binding particles via van der Waals force, have smallprojections and depressions in the surface. By the presence of theprojections and depressions, the absorption/scattering rate of UV lightincreases to improve UV-shielding performance. Furthermore, in therectangular particles obtained by treating the rod-shaped particles withheat, each of the rod-shaped fine particles constituting a rectangularshape grows by heat treatment and crystallinity thereof increases, withthe result that UV-shielding performance is further improved.Furthermore, whereas the spindle-shaped particles have a cylindricalshape with a thick center and tapered ends in the major axis, therectangular or rod-shaped particles of the present invention haveslightly widened ends in the major axis since the particles areconstituted of fine rod-shaped particles.

(Production Method)

A method for producing the rutile-type titanium dioxide of the presentinvention will be more specifically described. The rectangularrutile-type titanium dioxide of the present invention is obtained byadding hydrochloric acid to an acid-soluble titanium compound to controlpH to 1 to 3, performing a deflocculation treatment at a temperature of10 to 30° C., further adding hydrochloric acid, and performing thermalhydrolysis. The conditions of hydrolysis needs to be appropriatelycontrolled depending upon the acid solubility of a starting acid-solubletitanium compound. For example, if ortho-titanic acid, which is obtainedby neutralizing a titanyl sulfate solution or a titanium tetrachloridesolution with an alkali, is used as an acid-soluble titanium compound,the rutile-type titanium dioxide of the present invention is obtained byadding hydrochloric acid to the ortho-titanic acid to control pH to 1 to3, performing deflocculation at a temperature of 10 to 30° C., furtheradding hydrochloric acid to control the concentration of TiO₂ to be 50to 140 g/L and preferably 60 to 120 g/L, and the concentration ofhydrochloric acid to be 60 to 120 g/L and preferably 70 to 100 g/L, andperforming hydrolysis at 20 to 80° C. and preferably 25 to 60° C. If anunreacted titanium compound remains, aging is preferably performed at atemperature of 95° C. or more for 2 to 8 hours after the hydrolysis inorder to complete the reaction. Since aggregation of rectangularparticles is destroyed if they are allowed to age for a long time,reducing dispersibility, the aging time is appropriately set within 8hours.

The type of acid-soluble titanium compound used in the present inventionis not limited as long as it is a titanium compound soluble inhydrochloric acid and ortho-titanic acid, which is Obtained byneutralizing titanyl sulfate or titanium tetrachloride with an alkali ata low temperature, is preferable. Alternatively, an alkali salt oftitanic acid obtained by an alkali treatment of a meta-titanic acid canbe used.

Furthermore, the obtained rectangular rutile-type titanium dioxide istreated with heat to obtain rod-shaped rutile-type titanium dioxide. Thetemperature of the heat treatment varies depending upon the size ofaggregated particles of the rectangular rutile titanium dioxide;however, the temperature is preferably 300 to 700° C. If the temperatureis lower than 300° C., crystallization does not proceed. In contrast, ifthe temperature is higher than 700° C., sintering proceeds, with theresult that transparency of cosmetics employing the particles decreases.

(Surface Coating Layer)

To improve dispersion stability and durability in a dispersion medium inproducing a cosmetic, the surface of the aggregated particles can becoated with an inorganic substance. Examples of the inorganic substancethat can be used include water-containing oxides or oxides of metalssuch as aluminum, silicon, zinc, titanium, zirconium, iron, cerium andtin. The type of metal salt to be used for coating is not particularlylimited. Furthermore, before blending each of these titanium dioxides ina cosmetic, water repellent treatment and/or oil repellent treatment canbe applied in advance. In these treatments, organic substances are used.Examples of the organic substances include silicone compounds such asdimethylpolysiloxane and methyl hydrogen polysiloxane; coupling agentssuch as a silane coupling agent, an aluminum coupling agent, a titaniumcoupling agent and a zirconium coupling agent; fluorine compounds suchas a perfluoroalkyl phosphate compound; hydrocarbons, lecithin, aminoacids, polyethylene, wax, and fatty acids such as lauric acid andstearic acid.

(Inorganic Pigment and Organic Pigment that can be Used in Combination)

In obtaining a cosmetic containing the rutile-type titanium dioxide ofthe present invention as a component, various types of components suchas an inorganic pigment and an organic pigment that are generally usedin cosmetics, can be used, if necessary, in combination, in the cosmeticof the present invention. Examples of the inorganic pigment that can beused in combination include titanium dioxide, zinc oxide, red ironoxide, yellow iron oxide, black iron oxide, ultramarine blue pigment,iron blue pigment, cerium oxide, talc, white mica, synthetic mica, brownmica, black mica, synthesized fluorinated brown mica, mica titanium,micaceous iron oxide, sericite, zeolite, kaolin, bentonite, clay,silicic acid, silicic anhydride, magnesium silicate, aluminum silicate,calcium silicate, barium sulfate, magnesium sulfate, calcium sulfate,calcium carbonate, magnesium carbonate, boron nitride, bismuthoxychloride, alumina, zirconium oxide, magnesium oxide, chromium oxide,calamine, hydroxyapatite and a complex of these. Examples of the organicpigment that can be used in combination include a silicone powder, anelastic silicone powder, a polyurethane powder, a cellulose powder, anylon powder, a urethane powder, a silk powder, poly methyl methacrylate(PMMA) powder, starch, a polyethylene powder, a polystyrene powder,carbon black, tar dye, a natural dye, a metal soap such as zinc stearateand a complex thereof.

(Components that can be Blended)

In addition, in the cosmetic of the present invention, components otherthan the aforementioned components may be blended in accordance with anobject as long as the components do not quantitatively or qualitativelydamage the effects of the invention. For example, an oily ingredient, adye, a pH moderator, a moisturizer, a thickener, a surfactant, adispersing agent, a stabilizer, a coloring agent, a preservative, anantioxidant, a sequestering agent, an astringent, an anti-inflammatoryagent, a UV absorber and a fragrance can be appropriately blended aslong as an object of the invention can be attained.

(Form of Cosmetic)

The cosmetics of the present invention can be produced by a method knownin the art. As a form of the cosmetic, any type of form such as apowder, a solid powder, a cream, a milk liquid, lotion, an oily liquid,a solid oil and a paste may be taken. The cosmetics of the presentinvention may be, for example, a makeup base, a foundation, a concealer,a face powder, a control color, a sun-screen cosmetic, a lipstick, a lipcream, an eye shadow, an eyeliner, a mascaras, a brusher, a manicure, abody powder, a perfume powder and a baby powder; skin care cosmetics orhair care cosmetics.

(Contents of Rectangular and Rod-Shaped Rutile-Type Titanium Dioxide)

The total content of the rectangular and/or rod-shaped rutile-typetitanium dioxide of the present invention in these cosmetics, which canbe arbitrarily set depending upon the properties of cosmetics to berequired, is 0.1 to 50 wt %, and preferably 1 to 45 wt %. To therectangular and/or rod-shaped rutile-type titanium dioxide of thepresent invention, titanium dioxide having a different particle diameteror a different shape may be blended depending upon the purpose.

EXAMPLES

Now, the present invention will be more specifically described by way ofExamples, below. The following Examples are shown just as illustrations,which will not be construed as limiting the scope of the invention.

Example 1 Synthesis of Rutile-Type Titanium Dioxide

In a 160 g/L sodium carbonate solution, a solution containing titanylsulfate (100 g/L) as TiO₂ was slowly added dropwise such that the liquidtemperature did not exceed 25° C. Addition was terminated when pHreached 10. The white precipitate of ortho-titanic acid obtained by theneutralization, was filtered and sufficiently washed. After theortho-titanic acid cake washed was repulped by use of dilutedhydrochloric acid (200 g/L), the pH thereof was controlled to 2 with thesame diluted hydrochloric acid and deflocculation was performed at 10°C. for 3 hours. Subsequently, a 400 g/L concentrated hydrochloric acidwas added such that the liquid temperature did not exceed 30° C. tocontrol a TiO₂ concentration to 100 g/L and a hydrochloric acidconcentration to 80 g/L. Next, the solution was warmed while stirring toadjust the liquid temperature to 30° C. and hydrolysis was performed forone hour. Thereafter, aging was further performed at 95° C. for 3 hoursto synthesize rutile-type titanium dioxide. When the shape and particlediameter of the rutile-type titanium dioxide obtained were observed by atransmission electron microscope, rectangular aggregated particlesformed of rod-shaped particles aggregated and oriented in the form of abundle were observed, which had an apparent average major axial lengthof 250 nm, an apparent average minor axial length of 60 nm, an apparentaverage axial ratio of 4.2 and a specific surface area of 75 m²/g. Amicrograph of the particles observed by a transmission electronmicroscope is shown in FIG. 1.

Surface Treatment:

An aqueous suspension solution containing the obtained rutile-typetitanium dioxide was warmed and controlled to have a temperature of 70°C. Subsequently, 10 wt % sodium aluminate in terms of Al₂O₃ to titaniumdioxide was slowly added while stirring. After the mixture was stirredfor one hour, a 100 g/L diluted sulfuric acid was added to control pH to8.0. Next, a 5 wt % sodium stearate to titanium dioxide was added. Afterthe mixture was stirred for one hour, pH was controlled to 6.5 bydiluted sulfuric acid. After filtration and washing with water, theresultant titanium dioxide was dried by a dryer at 110° C. for 12 hoursto obtain surface-treated rutile-type titanium dioxide.

Example 2 Synthesis of Rutile-Type Titanium Dioxide

The white precipitate of ortho-titanic acid obtained in the same manneras in Example 1 was filtered and sufficiently washed. After theortho-titanic acid cake washed was repulped with diluted hydrochloricacid (200 g/L), the pH was controlled with the same diluted hydrochloricacid to 1 and deflocculation was performed at 10° C. for 3 hours.Subsequently, concentrated hydrochloric acid (400 g/L) was added suchthat the liquid temperature did not exceed 30° C. to control a TiO₂concentration to 80 g/L and a hydrochloric acid concentration to 110g/L. Next, the solution was warmed while stirring to adjust liquidtemperature to 45° C. and hydrolysis was performed for 3 hours.Thereafter, aging was further performed at 95° C. for 3 hours tosynthesize rutile-type titanium dioxide. When the shape and particlediameter of the obtained rutile-type titanium dioxide was observed by atransmission electron microscope, the particles were rectangularparticles formed of rod-shaped particles aggregated and oriented in theform of bundle having an apparent average major axial length of 300 nm,an apparent average minor axial length of 80 nm, an apparent averageaxial ratio of 3.8 and a specific surface area of 88 m²/g. A micrographof the particles observed by a transmission electron microscope is shownin FIG. 2.

Surface Treatment:

Surface-treated rutile-type titanium dioxide was obtained in the samemanner as in Example 1.

Example 3

To the aqueous suspension solution containing the rutile-type titaniumdioxide obtained in Example 1, a sodium hydroxide solution (400 g/L) wasadded while stirring to control (neutralize) the suspension solution topH 6.0. After filtration and washing with water, dehydration wasperformed by a dryer at 110° C. for 12 hours. The resultant dried powdersample was pyrolyzed in air at 550° C. for one hour. The shape of theresultant rutile-type titanium dioxide was observed by a transmissionelectron microscope and shown in FIG. 3. The particles were rod-shapedoriented/aggregated particles having an apparent average major axiallength of 170 nm, an apparent average minor axial length of 40 nm, anapparent average axial ratio of 4.3 and a specific surface area of 27m²/g.

Surface Treatment:

The obtained rutile-type titanium dioxide was repulped and warmed tocontrol the temperature to 70° C. Subsequently, 2 wt % sodium aluminatein terms of Al₂O₃ to titanium dioxide was slowly added while stirring.After the mixture was stirred for one hour, a 100 g/L diluted sulfuricacid was added to control pH to 8.0. Next, a 2 wt % sodium stearate totitanium dioxide was added. After the mixture was stirred for one hourand pH was controlled to 6.5 by diluted sulfuric acid. After filtrationand washing with water, dehydration was performed by a dryer at 110° C.for 12 hours to obtain surface-treated rutile-type titanium dioxide.

Comparative Example 1 Synthesis of Rutile-Type Titanium Dioxide

A titanyl sulfate solution was pyrolyzed, filtered and washed to obtainwater-containing titanium dioxide slurry. To the slurry, a 400 g/Lsodium hydroxide solution was added while stirring such that the weightratio of NaOH to TiO₂ is 3 and the mixture was heated at 95° C. for 2hours. Subsequently, the treated product was sufficiently washed. To theresultant slurry, hydrochloric acid (400 g/L) was added while stirringto control a TiO₂ concentration to 90 g/L, a hydrochloric acidconcentration to 80 g/L. Hydrolysis was performed at 95° C. for 2 hoursto synthesize rutile-type titanium dioxide. When the shape and particlediameter of the obtained rutile-type titanium dioxide was observed by atransmission electron microscope, the particles were spindle-shapedparticles not aggregated having an average major axial length of 80 nm,an average minor axial length of 10 nm and a specific surface area of 98m²/g, as shown in FIG. 4.

Surface Treatment:

Surface-treated rutile-type titanium dioxide was obtained by performinga surface treatment in the same manner as in Example 1.

Comparative Example 2 Synthesis of Rutile-Type Titanium Dioxide

The white precipitate of ortho-titanic acid obtained in the same manneras in Example 1 was filtered and sufficiently washed. After theortho-titanic acid cake washed was repulped with diluted hydrochloricacid (200 g/L), deflocculation was skipped and concentrated hydrochloricacid (400 g/L) and citric acid powder were added to control a TiO₂concentration to 80 g/L, a hydrochloric acid concentration to 110 g/Land a citric acid concentration to 4.0 g/L. Subsequently, the solutionwas warmed while stirring to adjust liquid temperature to 45° C. andhydrolyzed for 20 hours while stirring to synthesize rutile-typetitanium dioxide. The resultant rutile-type titanium dioxide wasobserved by a transmission electron microscope and the results are shownin FIG. 5. The particles were cylindrical cocoon-shaped particles inwhich rod-shaped particles are oriented in the form of a bundle andaggregated, having an average major axial length of 105 nm, an averageminor axial length of 70 nm, an average axial ratio of 1.5 and aspecific surface area of 148 m²/g.

Surface Treatment:

Surface-treated rutile-type titanium dioxide was obtained by performinga surface treatment in the same manner as in Example 1.

For reference, average major axial lengths, average minor axial lengths,average axial ratios and specific surface areas of the particles ofExamples 1 to 3 and Comparative Examples 1 to 2 are shown below.

TABLE 1 Major axial Minor axial Specific length length Axial surfacearea Sample name (nm) (nm) ratio (m²/g) Example 1 250 60 4.2 75 Example2 300 80 3.8 88 Example 3 170 40 4.3 27 Comparative 80 10 8.0 98 Example1 Comparative 105 70 1.5 148 Example 2

(Evaluation of UV-Shielding Performance)

From each of the rutile-type titanium dioxides obtained in Examples 1 to3, the spindle-shaped rutile-type titanium dioxide obtained inComparative Example 1 and the cocoon-shaped rutile-type titanium dioxideobtained in Comparative Example 2 and pigment-glade rutile-type titaniumdioxide (CR-50 manufactured by Ishihara Sangyo Kaisha, Ltd.) having anaverage particle diameter of 250 nm, a sample (0.05 g) was taken andkneaded together with dimethylpolysiloxane (1.95 g, 5000 cs) by use ofHoover's muller under load of 150 Lbs. for 50 revolutions. Each of theobtained paste was applied to a quartz glass plate by use of a filmapplicator with a film thickness of 23 μm and transmissivity wasmeasured by use of a V-670 type spectrophotometer (manufactured by JASCOCorporation). The results are shown in Table 2 and FIG. 1. Herein, thelight transmissivity values at wavelengths of 550 nm, 360 nm and 280 nmare represented as T₅₅₀, T₃₆₀ and T₂₈₀, respectively.

TABLE 2 Transmissivity (%) T₅₅₀ T₃₆₀ T₂₈₀ T₅₅₀ × T₂₈₀/ Sample name (550nm) (360 nm) (280 nm) T₃₆₀ Example 1 71.0 18.2 4.9 19.3 Example 2 70.122.3 5.8 18.2 Example 3 70.4 11.5 6.6 40.3 Comparative 88.1 30.5 1.33.72 Example 1 Comparative 85.5 26.9 0.6 1.86 Example 2 Pigment-grade67.8 49.2 51.3 70.7 titanium dioxide

As is apparent form Table 2 and FIG. 1, the rutile-type titaniumdioxides obtained in Examples 1 to 3 have high UV-shielding performance,compared to the rutile-type titanium dioxides obtained in ComparativeExamples 1 to 2 and the pigment-grade titanium dioxide, in particular,the effect is clearly exerted in the UVA region.

(Cosmetics)

Now, cosmetics containing the rectangular titanium dioxide powder of thepresent invention will be described below.

Formulation Example 1 W/O Emulsion Type Foundation

The rutile-type titanium dioxides obtained in Examples 1 to 3, thespindle-shaped rutile-type titanium dioxide obtained in ComparativeExample 1, the cocoon-shaped rutile-type titanium dioxide obtained inComparative Example 2, and further the aforementioned commerciallyavailable pigment-grade titanium dioxide were used to prepare W/Oemulsion type foundations.

(Component) Weight (%) 1. POE modified silicone (HLB = 4.5) 0.8 2.Polyglyceryl-polyricinoleate 0.5 3. Neopentyl glycol dicaprate 3.0 4.Squalane 1.0 5. Pentaerythrityl tetraoctanoate 2.0 6. Stearoyl Inulin(Note 1) 1.0 7. Cyclomethicone 9.4 8. Preservative appropriate amount 9.Antioxidant appropriate amount 10. Fragrance appropriate amount 11.Titanium dioxide powder of each of 10.0  Examples or Comparative Exampletreated with silicone 12. Silicone treated talc 4.0 13. Silicone treatedcolorant 1.0 14. Purified water Balance 15. 1,3-Butylene glycol 5.0 16.Glycerin 1.0 17. Sodium chloride 1.0 18. Preservatives appropriateamount (Note 1) Rheopearl ISK (manufactured by Chiba Flour Milling Co.,Ltd.)

(Production Method)

A: Components 11 to 13 are stirred and blended by a Henschel mixer.

B: The mixture A was added to components 1 to 10 and homogeneouslydispersed by a stirrer.

C: In another container, components 14 to 18 are dissolved by heating.

D: The mixture C is added to the mixture B, emulsified and thereaftergradually cooled to room temperature. In this manner, W/0 emulsion typefoundations were obtained.

(Evaluation of UV-Shielding Performance)

The SPF (Sun Protection Factor) and UVA ratio (a total absorption amountat a wavelength of 320 to 400 nm/a total absorption amount at awavelength of 290 to 320 nm) of each of the W/0 emulsion typefoundations prepared were measured by a UV-1000S SPF analyzermanufactured by Labsphere Inc. The results are shown in Table 3.

TABLE 3 UVA Sample name SPF ratio Example 1 14 0.7 Example 2 9 0.7Example 3 17 0.8 Comparative Example 1 17 0.5 Comparative Example 2 220.5 Pigment-grade titanium 3 1.0 dioxide

As shown in Table 3, the rutile-type titanium dioxide of the presentinvention had not only a high UVB shielding performance represented bySPF but also a high UVA shielding performance represented by UVA ratio.

The W/O emulsion type foundations obtained were evaluated forspreadability, smoothness, coverage, powdery finish and makeup-lastingproperty by sensory tests. The results are shown in Table 4.

TABLE 4 Makeup- Measurement Spread- Smooth- Powdery lasting sampleability ness Coverage finish property Example 1 ⊚ ⊚ ◯ ◯ ⊚ Example 2 ◯ ⊚◯ ◯ ⊚ Example 3 ◯ ◯ ⊚ ◯ ◯ Comparative Δ Δ X ⊚ Δ Example 1 Comparative ΔX Δ ◯ ◯ Example 2 Pigment-grade Δ X ⊚ X Δ titanium dioxide

Evaluation and Evaluation Criteria

Ten panelists used the W/O emulsion type foundations prepared using anyone of titanium dioxides of Examples 1 to 3 and Comparative Examples 1and 2 and commercially available pigment-grade titanium dioxide, andmade sensory evaluation on sensory test items shown in Table 4 based onfive-grade criteria. Determination was made based on average scores.

Evaluation Criteria

Extremely satisfactory: 5 points, satisfactory: 4 points, good: 3points, slightly unsatisfactory: 2 points, unsatisfactory: 1 point

Determination Criteria

4.0 to 5.0 points: ⊚, 3.0 to less than 4.0 points: ◯, 2.0 to less than3.0 points: Δ, 1.0 to less than 2.0 points: X

As the results of the sensory test, any one of the foundations obtainedby Examples 1 to 3 of the present invention was excellent inspreadability and smoothness during application, free of powdery finishdue to appropriate coverage and provided a natural finish withoutconcealing skin's natural beauty, compared to those of ComparativeExamples 1 and 2 and the commercially available pigment-grade titaniumdioxide. In addition, the foundations satisfactorily prolonged the wearof makeup and excellently maintained sheer coverage. As described, owingto the content of the rectangular and/or rod-shaped rutile-type titaniumdioxide of the present invention in a cosmetic made it possible toprovide a cosmetic having excellent UVB and UVA shielding performancesand excellent spreadability and smoothness during application without apowdery finish due to appropriate coverage and provide natural finishwithout concealing skin's natural beauty.

Formulation Example 2 W/O Emulsion Type Sunscreen

W/O emulsion type sunscreens were prepared using the rutile-typetitanium dioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Crosslinked polyether-modified 2.0 silicone(Note 1) 2. Crosslinked dimethylpolysiloxane (Note 2) 3.0 3.Decamethylcyclopentasiloxane 13.5 4. Dimethylpolysiloxane (6 mm²/second7.0 (25° C.)) 5. Dispersant containing surface- 25.0 treated titaniumdioxide any one of Examples 1 to 3 6. Silicone treated talc 4.0 7.1,3-Butylene glycol 5.0 8. Sodium citrate 0.4 9. Sodium chloride 0.5 10.Preservative appropriate amount 11. Purified water balance (Note 1)KSG-210 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2) KSG-15manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 5 are homogeneously mixed and then component 6 ishomogeneously dispersed.

B: Components 7 to 11 are homogeneously mixed.

C: The mixture B is gradually added to the mixture A while stirring andemulsified. In this manner, W/O emulsion type sunscreens were obtained.

It was confirmed that the obtained sunscreens can be applied uniformlyand lightly spread with excellent adhesiveness and satisfactoryadaptability without squeaky feeling and give a fresh sense of usewithout stickiness or greasiness; at the same time, the sunscreens havesatisfactory waterproofness, water repellency, perspiration fastness,excellent makeup-lasting property and stability without a change due totemperature and time.

Formulation Example 3 W/O Cream

W/O creams were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Crosslinked polyether-modified silicone(Note 1) 3.5 2. Crosslinked dimethylpolysiloxane (Note 2) 5.0 3.Branched polyether-modified silicone (Note 3) 1.0 4. Organic modifiedbentonite 1.2 5. Triethylhexanoin 5.0 6. Dimethylpolysiloxane (6mm²/second (25° C.)) 5.5 7. Decamethylcyclopentasiloxane 9.0 8. Acrylicsilicone resin dissolved product (Note 4) 1.5 9. Dispersant containingsurface-treated 25.0  titanium dioxide any one of Examples 1 to 3 10.1,3-Butylene glycol 5.0 11. Sodium citrate 0.4 12. Purified waterbalance (Note 1) KSG-210 manufactured by Shin-Etsu Chemical Co., Ltd.(Note 2) KSG-15 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3)KF-6028 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) KP-575manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 8 are mixed and homogeneously dispersed.

B: Component 10, 11 and 12 are mixed and dissolved.

C: The mixture B is added to the mixture A and homogeneously mixed.

D: Component 9 is added to the mixture C and homogeneously mixed. Inthis manner, W/O creams were obtained.

It was confirmed that the obtained W/O creams are lightly spread withoutsqueaky feeling, have satisfactory adaptability with excellentadhesiveness, provide a moist, watery and fresh sense of use andpleasant cooling sensation; at the same time, W/O creams havesatisfactory makeup lasting property and extremely excellent usabilityand stability without a change due to temperature and time.

Formulation Example 4 Powdery Foundation

Powdery foundations were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Caprylylsilane-treated mica (Note 1) 40.0  2.Powder according to any one of 5.0 Examples 1 to 3 3. Silicone-treatedtalc (Note 2) balance 4. Silicone-treated pigment-grade 5.0 titaniumdioxide (Note 2) 5. Silicone-treated fine particulate 5.0 titaniumdioxide (Note 2) 6. Silicone-treated barium sulfate (Note 2) 10.0  7.Silicone-treated iron red (Note 2) 0.4 8. Silicone-treated yellow ironoxide (Note 2) 2.0 9. Silicone-treated amber (Note 2) 0.4 10.Silicone-treated black iron oxide (Note 2) 0.1 11. Phenyl-modifiedhybrid silicone 2.0 composite powder (Note 3) 12. Spherical polymethylsilsesquioxane 0.5 powder (Note 4) 13. Preservative appropriate amount14. Fragrance appropriate amount 15. Crosslinked dimethylpolysiloxane(Note 5) 4.0 16. Glyceryl trioctanoate 2.0 17. Squalane 1.0 (Note 1)treated with AES-3083 manufactured by Shin-Etsu Chemical Co., Ltd. (Note2) treated with KF-9909 manufactured by Shin-Etsu Chemical Co., Ltd.(Note 3) KSP-300 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4)KMP-590 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 5) KSG-16manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 13 are mixed and homogeneously ground.

B: Components 15 to 17 are homogeneously mixed and added to the mixtureA.

C: Component 14 is added to the mixture B and press-molded in a mold. Inthis manner, powdery foundations were obtained.

The obtained powdery foundations were smooth and lightly spread,satisfactorily fitted with excellent adhesiveness, and further, thefoundations were less sticky and resistant to perspiration, prolongedthe wear of makeup and had excellent sense of use and usability.

Formulation Example 5 Pressed Powder

Pressed powders were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Talc balance 2. PMMA (7 μm) (Note 1) 10.0  3.Sericite 30.0  4. Scaly-shaped silica (Note 2) 3.0 5. Powder accordingto any one of 6.0 Examples 1 to 3 6. Preservative appropriate amount 7.Colorant appropriate amount 8. Octyl methoxycinnamate 3.0 9. Squalane2.0 10. Preservative appropriate amount 11. Antioxidant appropriateamount 12. Fragrance appropriate amount (Note 1) Matsumoto MicrosphereM-100 (manufactured by Matsumoto Yushi-Seiyaku Co., Ltd) (Note 2)Sunlovely C (manufactured by Dokai Chemical Industries Co., Ltd)

(Production Method)

A: Components 1 to 7 are mixed and ground.

B: The mixture A is transferred to a Henschel mixer and Components 8 to12 are added to the mixer, stirred and mixed to obtain a homogenousstate.

C: The mixture B is ground by an atomizer and press-molded in analuminum plate. In this manner, pressed powders were obtained.

It was confirmed that the obtained pressed powders are excellent inspreadability and smoothness during application and further provide anatural finish after application.

Formulation Example 6 2WAY Cake Foundation

2WAY cake foundations were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Methicone-treated talc balance 2. Powderaccording to any one of 10.0 Examples 1 to 3 3. Methicone-treated mica20.0 4. Methicone-treated sericite 36.0 5. Nylon powder 10.0 6.Methicone-treated yellow iron oxide 1.0 7. Methicone-treated red ironoxide 0.5 8. Methicone-treated black iron oxide 0.1 9.Dimethylpolysiloxane 1000cs 6.0 10. Isotridecyl isononanoate 3.0 11.Squalane 3.0 12. Preservative 0.2 13. Antioxidant 0.1

(Production Method)

A: Components 9 to 13 are dissolved by heating.

B: Components 1 to 8 are mixed by a Henschel mixer and the mixture A isadded to this.

C: The mixture B is ground by an atomizer and press-molded in analuminum plate. In this manner, 2WAY cake foundations were obtained.

It was confirmed that the obtained 2WAY cake foundations are excellentin spreadability and smoothness during application, further excellent intransparency after application and free of a powdery finish due toappropriate coverage, and provide a natural finish without concealingskin's natural beauty.

Formulation Example 7 Oily Cake Foundation

Oily cake foundations were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Dimethicone-treated talc 5.3 2. Powderaccording to anyone of 15.0 Examples 1 to 3 3. Dimethicone-treatedsericite 28.2 4. Dimethicone-treated red iron oxide 0.5 5.Dimethicone-treated yellow iron 1.8 oxide 6. Dimethicone-treated blackiron 0.2 oxide 7. Candelilla wax 1.0 8. Carnauba wax 1.0 9. Ceresin 1.510. Decamethylcyclopentasiloxane 14.0 11. Isononyl isononanoate balance12. Polyglyceryl diisostearate 2.0 13. Dextrin palmitate 1.0 14. Octylmethoxycinnamate 3.0 15. Preservative appropriate amount 16. Fagranceappropriate amount

(Production Method)

A: Components 1 to 6 are mixed by a Henschel mixer and homogeneouslyground.

B: Components 7 to 16 are dissolved by heating and the mixture A isadded to this and homogeneously stirred.

C: After defoaming, a bulk is poured into a tray and gradually cooled toroom temperature. In this manner, oily cake foundations were obtained.

It was confirmed that the obtained oily cake foundations are excellentin spreadability and smoothness during application, further excellent intransparency after application and free of a powdery finish due toappropriate coverage, and provide a natural finish without concealingskin's natural beauty.

Formulation Example 8 Stick Foundation

Stick foundations were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Dimethylpolysiloxane 18.0  2.Decamethylcyclopentasiloxane 30.0  3. Octyl methoxycinnamate 5.0 4.Diisostearyl malate 4.0 5. Candelilla wax 6.0 6. Hydrogenated jojobaester 4.0 7. Cetyldimethicone copolyl 2.0 8. Sorbitan sesquiisostearate0.5 9. Antioxidant appropriate amount 10. Preservative appropriateamount 11. Fragrance appropriate amount 12. Methicone-treated colorant0.5 13. Powder according to any one of 8.5 Examples 1 to 3 14.Methicone-treated talc 6.0 15. Methicone-treated mica 2.0 16. Methylpolymethacrylate 2.0 17. Purified water balance 18. Sodium citrate 0.319. 1,3-Butylene glycol 3.0 20. Glycerin 2.0 21. Preservativeappropriate amount

(Production Method)

A: Components 12 to 16 are mixed by a Henschel mixer.

B: Components 1 to 11 are weighted in a container enough to contain awhole amount and dissolved by heating.

C: Components 17 to 21 are weighted in another container and dissolvedby heating.

D: The mixture A is added to the mixture B and homogeneously dispersedand the mixture C was added and emulsified.

E: After deformation, a bulk is poured in a mold and gradually cooled toroom temperature. In this manner, stick foundations were obtained.

It was confirmed that the obtained stick foundations are excellent inspreadability and smoothness during application, further excellent intransparency after application and free of a powdery finish due toappropriate coverage, and provide a natural finish without concealingskin's natural beauty.

Formulation Example 9 O/W Emulsion Type Foundation

O/W emulsion type foundations were prepared using the rutile-typetitanium dioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Stearic acid 0.4 2. Isostearic acid 0.3 3.Cetyl 2-ethylhexanoate 4.0 4. Liquid paraffin 11.0 5. POE (10) stearylether 2.0 6. Cetyl alcohol 0.3 7. Preservative 0.2 8. Talc 15.0 9.Colorant 4.0 10. Powder according to any one of Examples 1 3.0 to 3 11.Triethanolamine 0.4 12. Propylene glycol 5.0 13. Purified water 54.1 14.Preservative 0.2 15. Antioxidant 0.1

(Production Method)

A: Components 1 to 7 are dissolved by heating at 85° C.

B: Components 8 to 10 are mixed and ground.

C: Components 11 to 15 are heated to 85° C., dissolved and mixed.

D: The mixture B is added to the mixture A and homogeneously dispersed.To the resultant mixture, the mixture C is gradually added. The mixtureis emulsified and cooled to room temperature while stirring.Subsequently, an appropriate container is charged with the emulsion. Inthis manner, an O/W emulsion type foundations were obtained.

It was confirmed that the obtained O/W emulsion type foundations areexcellent in spreadability and smoothness during application, furtherexcellent in transparency after application and free of a powdery finishdue to appropriate coverage, and provide a natural finish withoutconcealing skin's natural beauty.

Formulation Example 10 Moisturizing O/W Cream

Moisturizing O/W creams were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Crosslinked dimethylpolysiloxane (Note 1) 8.02. Crosslinked dimethylpolysiloxane (Note 2) 28.0 3.Decamethylcyclopentasiloxane 10.0 4. Powder according to any one ofExamples 1 to 3 5.0 5. Branched polyglycerin modified silicone (Note 3)0.3 6. Branched polyglycerin modified silicone (Note 4) 0.6 7.(Acrylamide/acryloyldimethyltaurine Na) 0.6 copolymer (Note 5) 8.Dimethyltaurineammonium acrylate/VP 12.0 copolymer (5% aqueous solution)(Note 6) 9. Polyethylene glycol 400 1.0 10. Sodium lactate 5.0 11.1,3-Butylene glycol 5.0 12. Purified water 24.5 (Note 1) KSG-15manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2) KSG-16manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) KF-6104manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) KF-6100manufactured by Shin-Etsu Chemical Co., Ltd. (Note 5) Simulgel 600manufactured by SEPIC (Note 6) Aristoflex AVC manufactured by Clariant

(Production Method)

A: Components 3 to 5 are mixed and homogeneously dispersed.

B: Components 1 and 2 and the mixture A are mixed and homogeneouslymixed.

C: Components 6 to 12 are homogeneously mixed.

D: The mixture B is gradually added to the mixture C with stirring tomake an emulsion. In this manner, moisturizing O/W creams were obtained.

It was confirmed that the obtained moisturizing O/W creams are waterywithout stickiness or greasiness, lightly spread without squeakyfeeling, have a fresh sense of use and pleasant cooling sensation; atthe same time, the creams are moist and watery and extremely excellentin usability and stability without a change due to temperature and time.

Formulation Example 11 O/W Cream

O/W creams were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Crosslinked dimethylpolysiloxane (Note 1) 5.02. Powder according to any one of 1.0 Examples 1 to 3 3. Glyceryltriisostearate 8.0 4. Cetanol 0.5 5. Stearic acid 1.0 6. Glycerylmonostearate 0.5 7. Sorbitan sesquioreate 0.5 8. Polyoxyethylenesorbitan monooleate 1.0 9. Triethanolamine 0.5 10. Carbomer (1% aqueoussolution) 20.0 11. Locust bean gum (2% aqueous solution) 5.0 12.1,3-Butylene glycol 7.0 13. Preservative appropriate amount 14.Fragrance appropriate amount 15. Purified water 50.0 (Note 1) KSG-15manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 8 are heated, mixed and homogenized.

B: Components 9 to 13 and 15 are mixed and heated.

C: The mixture B is gradually added to the mixture A while stirring. Theresultant mixture is emulsified and cooled and then, component 14 wasadded. In this manner, O/W creams were obtained.

It was confirmed that the obtained O/W creams are watery withoutstickiness or greasiness, have light spreadability and satisfactoryadaptability with excellent adhesion, a fresh sense of use and pleasantcooling sensation; at the same time, the creams are moist and watery andexcellent in usability and stability without a change due to temperatureand time.

Formulation Example 12 Body Lotion

Body lotions were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Alcohol 17.0 2. 1,3-Butylene glycol 3.0 3.Branched polyglycerin-modified silicone 0.5 (Note 1) 4. Glyceryltrioctanoate 1.0 5. Powder according to any one of Examples 1 2.0 to 36. Hybrid silicone composite powder (Note 2) 10.0 7.Dimethyltaurineammonium acrylate/VP 0.4 polymer 8. Xanthan gum (2%aqueous solution) 6.0 9. Sodium chloride 0.1 10. Purified water 60.0(Note 1) KF-6100 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2)KSP-100 manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 6 are homogeneously mixed.

B: Components 7 to 10 are homogeneously mixed.

C: The mixture A is gradually added to the mixture b while stirring. Inthis manner, body lotions were obtained.

It was confirmed that the obtained body lotions are watery withoutstickiness or greasiness, and have light spreadability and a moist,watery, fresh sense of use, pleasant cooling sensation, and extremelyexcellent usability and stability without a change due to temperatureand time.

Formulation Example 13 Sunshine-Cut Cream

Sunshine-cut creams were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to

(Component) Weight (%) 1. Crosslinked polyether-modified 3.0 silicone(Note 1) 2. Crosslinked dimethylpolysiloxane (Note 2) 2.0 3.Alkyl-modified branched polyether 1.0 modified silicone (Note 3) 4.Neopentylglycol dioctanate 5.0 5. Decamethylcyclopentasiloxane 17.5 6.Octyl methoxycinnamate 6.0 7. Acrylic silicone resin dissolved 10.0product (Note 4) 8. Caprylyl silane-treated fine 20.0 particulate zincoxide (Note 5) 9. Powder according to any one of 3.0 Examples 1 to 3 10.1,3-Butylene glycol 2.0 11. Sodium citrate 0.2 12. Sodium chloride 0.513. Fragrance appropriate amount 14. Purified water 29.8 (Note 1)KSG-240 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2) KSG-15manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) KF-6038manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) KP-575manufactured by Shin-Etsu Chemical Co., Ltd. (Note 5) AES-3083manufactured by Shin-Etsu Chemical Co.,

(Production Method)

A: Component 7 is added to a part of component 5 and homogenized andcomponents 8 and 9 are added and dispersed by a bead mill.

B: Components 1 to 4, the remainder of component 5 and component 6 arehomogeneously mixed.

C: Components 10 to 12 and component 14 are mixed and homogenized.

D: The mixture C is added to the mixture B and emulsified, the mixture Aand component 13 are added. In this manner, sunshine-cut creams wereobtained.

It was confirmed that the obtained sunshine-cut creams can be applied onthe skin uniformly since the surface coated with the cream is slightlydistinguishable, have light spreadability without stickiness,satisfactory adaptability with excellent adhesiveness, and provide afresh sense of use without greasiness; at the same time, the creams havesatisfactory waterproofness, water repellency, perspiration fastness andextremely excellent makeup-lasting property, rarely come off and haveexcellent stability without a change due to temperature and time.

Formulation Example 14 Press-Type Brusher

Press-type brushers were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Acrylic silicone resin-treated mica (Note 1)12.0 2. Silicone-treated talc (Note 2) 72.1 3. Red pigment 202 0.3 4.Yellow iron oxide 2.5 5. Black iron oxide 0.3 6. Silicone-treatedpigment-grade titanium 0.5 dioxide (Note 2) 7. Powder according to anyone of Examples 1 0.3 to 3 8. Phenyl-modified hybrid silicone composite2.0 powder (Note 3) 9. Dimethylpolysiloxane (6 mm²/second (25° C.)) 5.010. Vaseline 2.0 11. Polyethylene wax 3.0 (Note 1) Treated with KP-574manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2) KF-9909manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) KSP-300manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 8 are homogeneously dispersed.

B: Components 9 to 11 are mixed by heating.

C: The mixture B is added to the mixture A and homogeneously mixed. Themixture is press-molded in a metal plate. In this manner, press-typebrushers were obtained.

The obtained press-type brushers are lightly spread without greasiness,powdery or squeaky feeling and excellent in adhesiveness to skin, andprovides a fresh sense of use; at the same time, the brushers are moistand satisfactory in waterproofness, water repellency, and perspirationfastness. The brushers rarely come off and have excellent stabilitywithout a change due to temperature and time.

Formulation Example 15 Loose Powder

Loose powders were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Talc balance 2. Powder according to any one of1.0 Examples 1 to 3 3. Amihope LL 3.0 4. PMMA (10 μm) (Note 1) 8.0 5.Preservative appropriate amount 6. Colorant appropriate amount 7.Squalane 1.0 8. Preservative appropriate amount 9. Antioxidantappropriate amount 10. Fragrance appropriate amount (Note 1) MatsumotoMicrosphere S-100 manufactured by Matsumoto Yushi-Seiyaku Co., Ltd.

(Production Method)

A: Components 1 to 7 are mixed and ground.

B: The mixture A is transferred to a Henschel mixer and components 8 to10 are added, stirred and mixed so as to obtain a homogeneous state

C: The mixture B is ground by an atomizer and charged. In this manner,loose powders were obtained.

It was confirmed that the obtained loose powders are excellent inspreadability and smoothness during application, excellent intransparency after application and free of a powdery finish due toappropriate coverage, and provide a natural finish without concealingskin's natural beauty.

Formulation Example 16 Eye Liner

Eye liners were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Black iron oxide 7.0 2. Powder according toany one of Examples 1 5.0 to 3 3. Vinyl acetate resin emulsion 45.0 4.Concentrated glycerin 6.0 5. POE (20)sorbitan laurate 1.8 6. Carboxymethylcellulose (10% aqueous 18.0 solution) 7. Purified water 14.9 8.Preservative 0.1 9. Fragrance 0.2

(Production Method)

A: Components 5 and 6 are added to component 7. To this, components 1 to3 are added and treated by a colloid mill.

B: Components 4, 8 and 9 are mixed and the mixture A is added at 70° C.The resultant mixture is homogeneously dispersed, cooled and charged. Inthis manner, eye liners were obtained.

It was confirmed that the obtained eye liners are excellent inadhesiveness, makeup lasting property and color tone.

Example 17 Eyelash Liner

Eyelash liners were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Water 26.0 2. Polyvinylpyrrolidone 2.0 3.Butylene glycol 2.0 4. Cationized cellulose (1% aqueous 10.0 solution)5. Bentonite 0.5 6. Triethanolamine 1.7 7. Talc 2.7 8. Powder accordingto any one of 1.0 Examples 1 to 3 9. Yellow iron oxide 0.9 10. Red ironoxide 0.9 11. Black iron oxide 4.8 12. Carnauba wax 5.5 13. Beeswax 9.014. Stearic acid 2.0 15. Self-emulsion type glyceryl 2.0 stearate 16.Propylene glycol stearate 2.0 17. Hydrogenated polyisobutene 2.0 18.Cyclomethicone 4.0 19. Preservative appropriate amount 20. Antioxidantappropriate amount 21. Resin emulsion 20.0

(Production Method)

A: Components 7 to 11 are stirred and mixed by a Henschel mixer.

B: The mixture A is added to Components 1 to 6 and homogeneouslydispersed by a stirrer.

C: Components 12 to 20 are dissolved by heating in another container.

D: The mixture C is added to the mixture B. The resultant mixture isemulsified and cooled to 40° C. Component 21 is added and the mixture iscooled to room temperature. In this manner, eyelash liners wereobtained.

It was confirmed that the obtained eyelash liners have appropriate grossand excellent adhesion to eyebrow, makeup lasting property and colortone.

Formulation Example 18 Cream Eye Shadow

Cream eye shadows were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Acrylic silicone resin dissolved product(Note 1) 10.0 2. Stearyl modified acrylic silicone resin (Note 2) 2.0 3.Branched polyether-modified silicone (Note 3) 1.5 4.Decamethylcyclopentasiloxane 20.3 5. Isotridecyl isononanoate 3.0 6.Dimethyldistearyl ammonium hectorite 1.2 7. Acrylic siliconeresin-treated pigment (Note 4) 10.0 8. Powder according to any one ofExamples 1 10.0 to 3 9. Spherical nylon 3.0 10. Talc 4.0 11. Ethanol 5.012. Purified water 30.0 (Note 1) KP-545 manufactured by Shin-EtsuChemical Co., Ltd. (Note 2) KP-561P manufactured by Shin-Etsu ChemicalCo., Ltd. (Note 3) KF-6028P manufactured by Shin-Etsu Chemical Co., Ltd.(Note 4) Treated with KP-574 manufactured by Shin-Etsu Chemical Co.,Ltd.

(Production Method)

A: Components 1 to 6 are mixed and components 7 to 10 are added,homogeneously mixed and dispersed.

B: Components 11 and 12 are mixed.

C: The mixture B is added to the mixture A and emulsified. In thismanner, cream eye shadows were obtained.

It was confirmed that the obtained cream eye shadows are lightly spreadand free of greasiness, powdery and squeaky feeling, and have excellentadhesiveness to skin and provide a fresh sense of use; at the same time,the eye shadows are moist and satisfactory in waterproofness, waterrepellency and perspiration fastness, and rarely come off and haveexcellent stability without a change due to temperature and time.

Formulation Example 19 Eye Shadow

Eye shadows were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Methicone-treated talc 36.5 2. Powderaccording to any one of 9.0 Examples 1 to 3 3. Boron nitride 9.0 4.Titanated Mica 35.0 5. Dimethicone 1000cs 5.0 6. Pigment red 202 0.5 7.Neopentyl glycol dioctanoate 1.0 8. Squalane 4.0 9. Preservativeappropriate amount 10. Antioxidant appropriate amount

(Production Method)

A: Components 1 to 5 are mixed and ground.

B: The mixture A is transferred to a Henschel mixer, to which a mixtureof components 6 to 10 separately prepared are added, stirred and mixedso as to obtain a homogenous state.

C: The mixture B is ground by an atomizer. This is press-molded in analuminum plate. In this manner, eye shadows were obtained.

It was confirmed that the obtained eye shadows are excellent in makeuplasting property, adhesiveness, color tone and usability.

Formulation Example 20 Nail Enamel

Nail enamels were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Nitro cellulose (½ second) 10.0 2. Modifiedarkyd resin 10.0 3. Acetyltributyl citrate 5.0 4. Butyl acetate 15.0 5.Ethyl acetate 20.0 6. Ethanol 5.0 7. Toluene 35.0 8. Ultramarine blue0.5 9. Powder according to any one of Examples 1 0.1 to 3 10. Organicmodified montmorillonite 1.0

(Production Method)

A: Components 8 and 9 are dissolved in a part of Components 2 and 3 andsufficiently kneaded.

B: To the mixture A, the reminder of components 2 and 3, and components1, 4 to 7 and 10 are added, mixed. A container is charged with theresultant mixture. In this manner, nail enamels were obtained.

It was confirmed that the obtained nail enamels are excellent inadhesiveness to nail, stability with time and color tone.

Formulation Example 21 Polyol-in-Solid Oil Emulsion Brusher

Polyol-in-solid oil emulsion brushers were prepared using therutile-type titanium dioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Crosslinked polyglycerin modified 3.0 silicone(Note 1) 2. Crosslinked dimethylpolysiloxane (Note 2) 5.0 3.Decamethylcyclopentasiloxane 18.0 4. Dimethylpolysiloxane (6 mm²/second21.6 (25° C.)) 5. Cetyl isooctanoate 5.0 6. Behenyl modified acrylicsilicone 3.0 resin (Note 2) 7. Paraffin wax (melting point 80° C.) 9.08. Dimethyldistearyl ammonium 0.2 hectorite 9. Powder according to anyone of 10.0 Examples 1 to 3 10. Acrylic silicone-treated blue 401 (Note3) 5.0 11. Acrylic silicone-treated black 0.2 iron oxide (Note 3) 12.Acrylic silicone-treated mica (Note 3) 5.0 13. Preservative appropriateamount 14. Fragrance appropriate amount 15. 1,3-Butylene glycol 15.0(Note 1) KSG-710 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2)KSG-15 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) KP-562Pmanufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 1 to 8 are heated to 80° C. and homogeneously mixed.

B: Components 9 to 12 are homogeneously mixed, added to the mixture Aand homogeneously dispersed.

C: Components 13 and 15 are mixed and heated to 80° C.

D: The mixture C is added to the mixture B and emulsified, and component14 is added. The resultant mixture is poured into a metal plate andcooled. In this manner, Polyol-in-solid oil emulsion brushers wereobtained.

It was confirmed that the obtained polyol-in-solid oil emulsion brushersare non-aqueous products, which are lightly spread without stickiness orgreasiness, have excellent adhesiveness without powdery feeling, andprovide moisten skin after makeup and good stability with time.

Formulation Example 22 Brusher

Brushers were prepared using the rutile-type titanium dioxides obtainedin Examples 1 to 3.

(Component) Weight (%) 1. Talc balance 2. Sericite 60.9  3. Fineparticulate titanium dioxide 3.0 4. Powder according to any one of 2.0   Examples 1 to 3 5. Colorant appropriate amount 6. Octylmethoxycinnamate 3.0 7. Octyl palmitate 5.0 8. Preservative appropriateamount 9. Antioxidant appropriate amount

(Production Method)

A: Components 6 to 9 are dissolved by heating.

B: Components 1 to 5 are mixed by a Henschel mixer, to which the mixtureA is added.

C: The mixture B is ground by an atomizer and molded in a medium plate.In this manner, brushers were obtained.

It was confirmed that the obtained brushers have excellent spreadabilityand smoothness during application and further provide a natural finish(the color of brushers on skin is indistinguishable from apparent colorof products).

Formulation Example 23 Cream-Type Lip Stick

Cream-type lip sticks were prepared using the rutile-type titaniumdioxides obtained in Examples 1 to 3.

(Component) Weight (%) 1. Palmitic acid/dextrin 9.0 ethylhexanoate(Note 1) 2. Dipolyglyceryl triisostearate 10.0 3. Glyceryl trioctanoate8.0 4. Alkyl-modified crosslinked 8.0 dimethylpolysiloxane (Note 2) 5.Alkyl-modified branched 2.0 polyglycerin-modified silicone (Note 3) 6.Decamethylcyclopentasiloxane 40.0 7. 1,3-Butylene glycol 5.0 8. Purifiedwater 18.0 9. Red pigment No. 201 appropriate amount 10. Red pigment No.226 appropriate amount 11. Yellow pigment No. 4 appropriate amount 12.Powder according to any one of appropriate amount Examples 1 to 3 13.Mica appropriate amount 14. Fragrance appropriate amount (Note 1)Rheopearl TT, manufactured by Chiba Flour Milling Co., Ltd. (Note 2)KSG-43 manufactured by Shin-Etsu Chemical Co., Ltd. (Note 9) KF-6105manufactured by Shin-Etsu Chemical Co., Ltd.

(Production Method)

A: Components 9 to 12 are added to a part of Component 2 and dispersedby a roller.

B: Component 1, the remainder of component 2 and components 3 to 6 arehomogeneously mixed by heating.

C: The mixture A is added to the mixture B and homogeneously mixed.

D: Components 7 and 8 are mixed, warmed and then added to the mixture Cand emulsified.

E: Components 13 and 14 are added to the mixture D. In this manner,cream-type lip sticks were obtained.

It was confirmed that the obtained cream-type lip sticks are lightly andeasily spread on lips without stickiness or greasiness, retain moistureand give no feeling of dryness; at the same time, the lip sticks keeplonger on lips without a powdery finish or bleeding and have goodstability with time.

Formulation Example 24 Cleansing Foam

Cleansing foams were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Lauric acid 3.0 2. Myristic acid 9.0 3.Palmitic acid 8.0 4. Stearic acid 10.0 5. Glycerin 15.0 6. 1,3-Butyleneglycol 7.0 7. Glyceryl stearate 1.5 8. Preservative 0.2 9. Chelatingagent 0.1 10. Water balance 11. Potassium hydroxide 6.0 12.Cocamidopropyl betaine 3.3 13. Potassium cocoyl glycinate 3.0 14.Glycosyl trehalose 4.5 15. Powder according to any one of Examples 1 1.5to 3

(Production Method)

A: Components 1 to 9 are mixed and dissolved by heating.

B: In another container, components 10 and 11 are weighed. The resultantmixture is added to the mixture A and saponified.

C: Components 12 to 15 are added to the mixture B and homogeneouslystirred and mixed, and then cooled to room temperature. Subsequently, anappropriate container is charged with the mixture. In this manner,cleansing foams were obtained.

It was confirmed that the obtained cleansing foams have beautiful whiteapparent color and excellent foaming property and foams last long whilekeeping washing properties.

Formulation Example 25 Lip Stick

Lip sticks were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Ceresin 11.0 2. Carnauba wax 1.0 3. Glyceryl2-ethylhexanoate 13.0 4. Mineral oil 14.0 5. Hydrogenated polyisobutene20.0 6. Methylphenylpolysiloxane 20.0 7. Octyldodecyl ricinoleate 5.0 8.Red pigment No. 202 1.0 9. Powder according to any one of 7.0 Examples 1to 3 10. Titanated mica 3.0 11. Antioxidant appropriate amount 12.Preservative appropriate amount

(Production Method)

A: Components 1 to 12 are mixed by heating and homogeneously stirred.

B: The mixture A is deformed and a bulk is poured into a mold, andquickly cooled. In this manner, lip sticks were obtained.

It was confirmed that the obtained lip sticks are excellent in gloss andhave adhesion feeling and appropriate spreadability. If a generalpigment-grade titanium dioxide is used, it is difficult to obtain aproduct providing the same color tone as apparent color of the productwhen applied to lips; however the lip sticks obtained in this examplewere confirmed to provide the same colors on lips as apparent colors ofthe lip stick products.

Formulation Example 26 Lip Gross

Lip grosses were prepared using the rutile-type titanium dioxidesobtained in Examples 1 to 3.

(Component) Weight (%) 1. Dextrin palmitate 10.0 2. Diisostearyl malate44.0 3. Liquid paraffin 42.6 4. Preservative 0.1 5. Antioxidant 0.1 6.Titanium mica 0.1 7. Aluminum powder 0.1 8. Powder according to any oneof Examples 1 to 3 3.0

(Production Method)

A: Components 1 to 5 are heated to 85° C. and homogeneously dissolved.

B: To the mixture A, components 6 to 8 are added and homogeneouslydispersed.

C: A container is charged with the resultant mixture at a hightemperature and quickly cooled to room temperature. In this manner, lipgrosses were obtained.

It was confirmed that the obtained lip grosses are excellent inadhesiveness and stability with time, and the colors on the lips are thesame as apparent colors of the lip gross products.

1. A rutile-type titanium dioxide, comprising: the rutile-type titaniumdioxide in a rectangular particulate form configured such that a majoraxial plane of rod-shaped particles having a minor axis diameter of from3 to 10 nm is oriented and aggregated in a minor axial direction,wherein an apparent average major axial length of oriented andaggregated particles is from 100 to 400 nm, an apparent average minoraxial length of the oriented and aggregated particles is from 30 to 150nm, an apparent average axial ratio represented by the apparent averagemajor axial length/the apparent average minor axial length is from 2 to5 and a specific surface area of the oriented and aggregated particlesis from 10 to 100 m²/g.
 2. The rutile-type titanium dioxide according toclaim 1, which is subjected to a heat treatment, to form a rod shape. 3.The rutile-type titanium dioxide according to claim 1, wherein a filmformed from paste prepared by dispersing the rutile-type titaniumdioxide in dimethicone has a light transmissivity at a wavelength 550nm, 360 nm, and 280 nm are represented by T550, T360, and T280,respectively, a value of (T550×T280/T360) is from 5.0 to 55.0.
 4. Therutile-type titanium dioxide according to claim 1, wherein surfaces ofthe oriented and aggregated particles are coated with a layer of aninorganic substance, an organic substance, or a combination thereof. 5.The rutile-type titanium dioxide according to claim 4, wherein theinorganic substance comprises at least one compound selected from thegroup consisting of aluminum, silicon, zinc, titanium, zirconium, iron,cerium, and tin.
 6. The rutile-type titanium dioxide according to claim4, wherein the organic substance comprises at least one compoundselected from the group consisting of a silicone compound, a couplingagent, a fluorine compound, and a fatty acid.
 7. A cosmetic, comprising:the rutile-type titanium dioxide according to claim
 1. 8. A method forproducing the rutile-type titanium dioxide according to claim 1, themethod comprising: controlling pH of a solution comprising anacid-soluble titanium compound to from 1 to 3, subjecting theacid-soluble solution to a deflocculation treatment at a temperature offrom 10 to 30° C., adding hydrochloric acid to the acid-solublesolution, and performing a hydrolysis reaction at a temperature of 20 to80° C.
 9. A method for producing the rutile-type titanium dioxideaccording to claim 2, the method comprising: controlling pH of asolution comprising an acid-soluble titanium compound to from 1 to 3,subjecting the acid-soluble solution to a deflocculation treatment at atemperature of from 10 to 30° C., adding hydrochloric acid to theacid-soluble solution, and performing a hydrolysis reaction at atemperature of 20 to 80° C.